Microscopic magnetic and structural nature of spinel Li[LixMn2-x]O-4

作者：Sugiyama J^*; Mukai K; Ikedo Y; Russo P L; Suzuki T; Watanabe I; Brewer J H; Ansaldo E J; Chow K H; Ariyoshi K; Ohzuku T

来源：Physical Review B, 2007, 75(17): 174424.

DOI：10.1103/PhysRevB.75.174424

The magnetic nature of the spinel antiferromagnet Li[LixMn2-x]O-4 with x=0-0.15 has been studied with muon-spin rotation and relaxation (mu+SR) spectroscopy. Both weak-transverse-field and zero-field mu+SR measurements indicate that the whole sample enters into a static disordered magnetic phase below T-N for all the samples measured; T-N=61 K for LiMn2O4, but 27-23 K for the x=0.05-0.15 samples. It was also clarified that both the field distribution width and the field fluctuation rate show a clear change at the Jahn-Teller (JT) transition temperature (T-JT=280 K) for LiMn2O4, and a short-range cooperative JT distortion appears below 280 K even for Li[Li0.15Mn1.85]O-4.

• 出版日期2007-5